Waterborne polyurethane epoxy resin modified emulsified asphalt
A water-based polyurethane and epoxy resin technology, applied in the direction of on-site coagulation pavement, building components, building insulation materials, etc., can solve the problems of inferior asphalt, low flexibility, brittle cracking, etc., and achieve high cohesion. , Good flexibility, not easy to fall off
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Embodiment 1
[0031] 1. Preparation of water-based epoxy resin curing agent
[0032] Diethylenetriamine and polypropylene glycol diglycidyl ether are in a molar ratio of 4:1, put diethylenetriamine into a four-necked flask with stirring and reflux condensation, add a small amount of sodium hydroxide, heat to 70°C, and slowly add polypropylene glycol After adding diglycidyl ether, continue to react under stirring for 3 hours, then distill off excess diethylenetriamine under reduced pressure, add hydrochloric acid and water to neutralize to pH 8.0, solid content 50%.
[0033] 2. Preparation of Waterborne Polyurethane Epoxy Resin
[0034] 2.1 Preparation of polyurethane epoxy resin
[0035] Put polyethylene glycol 80 into a dry four-necked flask with stirring and reflux condensation, heat to 80°C, vacuumize to remove moisture, fill with nitrogen for protection, slowly add hexamethylene diisocyanate, and continue to react under stirring after the addition is complete 4 hours.
[0036] Add ep...
Embodiment 2
[0047] 1. Preparation of water-based epoxy resin curing agent
[0048] Triethylenetetramine and polypropylene glycol diglycidyl ether are in a molar ratio of 4:1, put triethylenetetramine into a four-necked flask with stirring and reflux condensation, add an appropriate amount of sodium hydroxide, heat to 70 °C, and slowly add polypropylene glycol After adding diglycidyl ether, continue to react under stirring for 3 hours, then distill off excess triethylenetetramine under reduced pressure, add hydrochloric acid and water to neutralize to pH 2.0, solid content 50%.
[0049] 2. Preparation of Waterborne Polyurethane Epoxy Resin
[0050] 2.1 Preparation of polyurethane epoxy resin
[0051] Put polyethylene glycol 200 into a dry four-neck flask with stirring and reflux condensation, heat to 80°C, vacuumize to remove moisture, fill with nitrogen for protection, slowly add toluene diisocyanate, and continue to react under stirring for 4 hours after the addition is complete.
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